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<title>Grid with DataWriter Example</title>

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<h1>Ext.data.DataWriter Example</h1>
<p>This example shows how to implement a Writer for your Store.  A Writer-enabled Store frees you from having to manually compose Ajax requests
to perform CRUD actions on a Store.</p>
<p>Note that the js is not minified so it is readable. See <a href="writer.js">writer.js</a>, <a href="UserForm.js">UserForm.js</a> and
<a href="UserGrid.js">UserGrid.js</a>.</p>

<p>The HttpProxy plugged into the store in this example uses the new <em>api</em> configuration instead of an <em>url</em>.
A simple MVC-like php backend has been created for this example which simulates a database by storing records in $_SESSION.  See the file /remote/app/controllers/users.php.  You may have to configure
your web-server to allow scripts to be executed in the /examples directory.</p>

<code><pre>
var proxy = new Ext.data.HttpProxy({
    api: {
        read    : 'app.php/users/read',
        create  : 'app.php/users/create',
        update  : 'app.php/users/update',
        destroy : 'app.php/users/destroy'
    }
});
</pre></code>

<p>Take note of the requests being generated in Firebug as you interact with the Grid and Form.</p>

<p>An <b>Error has been simulated</b> on the server-side:  Attempting to update a record having ODD-numbered id will generate this errror.
Responses from the update action will have successProperty === false along with a message.  This error can be handled by
listening to the <b>"exception"</b> event upon your Store.</p>

<code><pre>
exception : function(proxy, type, action, options, res, arg) {
    if (type === 'remote') {
        Ext.Msg.show({
            title: 'REMOTE EXCEPTION',
            msg: res.message,
            icon: Ext.MessageBox.ERROR
        });
    }
}
</pre></code>
<p><b>Note: This new "exception" event supercedes the old loadexception event which is now deprecated.</b></p>

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